An MRI scan uses radio waves and powerful magnets, not X-rays or other forms of ionizing radiation.
How MRI Scans Work
Unlike X-rays and CT scans, which utilize ionizing radiation to create images, Magnetic Resonance Imaging (MRI) employs a different approach. Here's a breakdown:
- Powerful Magnets: An MRI machine uses a strong magnetic field. This field aligns the protons in the body.
- Radio Waves: The machine then emits radio waves. These radio waves temporarily knock the protons out of alignment.
- Image Creation: When the radio waves are turned off, the protons realign. During this process, they emit signals that the MRI machine detects and uses to create detailed images.
Comparison with X-Rays and CT Scans
| Feature | MRI Scan | X-Ray & CT Scan |
|---|---|---|
| Imaging Method | Powerful magnets and radio waves | Ionizing radiation (X-rays) |
| Radiation Exposure | None | Exposure to ionizing radiation |
| Image Detail | Excellent for soft tissues | Good for bones; less detail for soft tissues |
Key Takeaway
The reference material clearly states that MRI scans use powerful magnets and radio waves, not X-rays or any other ionizing radiation.
